Conciseness

The body is command-and-table dense with almost no explanation of concepts Claude already knows, fitting the 4 anchor ('efficient; minor instances of over-explanation that could be trimmed'). Trimmable redundancy exists: the 'use the project's custom start script if one exists' guidance is stated three times (§1.1, §1.2 item 2, §1.2 item 4), the `argent-test-ui-flow` pointer appears twice in §5, the test-clarification guidance appears in both §5.2 and the closing line, and the Quick Reference table re-lists commands already given inline. It is not 5 for these duplicated tokens, but well above the 3 anchor's 'unnecessary explanation'.

Actionability

Fully executable guidance throughout: exact commands (`lsof -i :PORT`, `adb -s <serial> reverse tcp:8081 tcp:8081`, `cd ios && pod install --repo-update`, `detox build --configuration ios.sim.release`), tool invocations with named parameters (`boot-device` with `udid`/`avdName`, `reinstall-app` with UDID, bundle ID, .app path), and detection commands like comparing bundle mtime via `ls -la apps/mobile/android/app/build/generated/...`. Placeholders are substitution parameters, not pseudocode, and common cases (iOS, Android, flavored builds, cache staleness) are covered — the 5 anchor.

Workflow Clarity

Clear sequencing with explicit validation checkpoints and feedback loops: verify Metro readiness via `debugger-status` before running the app, ordered recovery steps ('Order of operations (simplest first)'), a stop condition ('After 2-3 failed build or run attempts, STOP and ask the user'), symptom → detection → fix loops for stale-build gotchas, and checklists after each phase. Destructive operations (kill Metro, `rm -rf build Pods Podfile.lock`) are gated behind user confirmation and `stop-metro` confirmation requirements, so the destructive-operation cap does not apply. This matches the 5 anchor ('explicit validation steps; feedback loops for error recovery; checklists').

Progressive Disclosure

The skill has no bundle files at all — everything lives in a ~270-line SKILL.md. Cross-skill pointers are well signaled (a Related Skills table plus inline mentions), but content that clearly belongs in a separate reference is inlined: §3.6's ~28 lines of EAS-build-cache and gradle UP-TO-DATE gotchas is specialized troubleshooting detail, and §3.5's device-control table plus the Quick Reference command table substantially overlap. This fits the 3 anchor ('some structure but... content that should be separate is inline'); it is not 4 because there are no reference files to offload the deep material into, and not 2 because section structure and navigation within the file are genuinely good.

Specificity

Lists multiple specific concrete actions — 'developing or debugging React Native apps', 'starting the app, debugging Metro, fixing builds, diagnosing runtime errors, or running tests' — which comprehensively cover the skill's scope. This matches the 5 anchor ('multiple specific concrete actions; comprehensive coverage') and exceeds the 4 anchor's 'minor gaps in coverage' since every major body section maps to a stated capability.

Completeness

Explicitly answers both: what ('Step-by-step workflows for developing or debugging React Native apps on iOS simulator or Android emulator') and when ('Use when starting the app, debugging Metro, fixing builds, diagnosing runtime errors, or running tests') with concrete trigger phrases. This is structurally identical to the 5-anchor example; it is not the 4 anchor because the 'when' clause is explicit and enumerates five triggers rather than being loosely stated.

Trigger Term Quality

Good natural-phrase coverage: 'starting the app', 'debugging Metro', 'fixing builds', 'running tests' are things users would actually say. A few natural variations are missing (e.g. 'reload', 'build error', 'simulator', 'emulator won't connect', 'run-ios'), so it fits the 4 anchor ('good keyword coverage; a few natural terms missing') rather than the 5 anchor's synonym-and-extension completeness.

Distinctiveness Conflict Risk

React Native + iOS simulator/Android emulator + Metro is a clear niche, but the phrase 'debugging Metro' overlaps with the body's referenced `argent-metro-debugger` skill, creating minor overlap risk with closely related skills — exactly the 4 anchor. Not 5 because a 'debugging Metro' query could plausibly route to the dedicated Metro-debugger skill instead; not 3 because the triggers are far more specific than 'somewhat specific'.